JP2023080377A - polyurethane foam - Google Patents

Abstract

To provide polyurethane foam that dries well after washing and is suitable for articles to be washed, e.g., bedding such as mattresses and pillows, furniture such as seat cushions, clothing such as pads for brassieres, and the like.SOLUTION: In polyurethane foam obtained from a polyurethane foam composition containing a polyol component, a polyisocyanate and a blowing agent, the polyol component contains a plant-derived polyol, and the biomass degree measured according to ASTM D6866-20 is 24% or more.SELECTED DRAWING: Figure 1

Description

An object of the present invention is to provide a polyurethane foam having good drying properties after washing.

Polyurethane foam is formed from a polyurethane foam composition containing a polyol component, isocyanate, and a foaming agent, and is widely used as a material for bedding, clothing, and the like (Patent Documents 1, 2, 3).

JP 2005-270146 A JP 2019-17948 A Japanese Patent Application Laid-Open No. 2019-203061

However, since polyurethane foam has a fine cell (cell) structure, it has a problem of high water retention and poor drying property after washing.

An object of the present invention is to provide a polyurethane foam having good drying properties after washing.

The present invention features a polyurethane foam having a degree of biomass of 24% or greater as measured by ASTM D6866-20.

Since the polyurethane foam of the present invention has a biomass degree of 24% or more as measured by ASTM D6866-20, it has good drying properties after washing.
The degree of biomass refers to the ratio of naturally-derived raw materials contained in a product, and by measuring the amount of radioactive carbon C14 that is contained only in naturally-derived substances, the degree of biomass of the product can be determined. can be measured.
The biomass degree in the present invention is based on ASTM D6866-20, measures the C14 concentration of the polyurethane foam by accelerator mass spectrometry (AMS method), and calculates the ratio (%) to the C14 concentration of 100% naturally derived substances at present. It is required by

1 is a table showing measurement results of formulations, physical properties, and dryness after washing in Examples and Comparative Examples of the present invention. It is a table|surface which shows the content of each course of a washability test. It is a table|surface which shows the result of a drying test.

The polyurethane foam of the present invention has a biomass degree of 24% or more as measured by accelerator mass spectrometry (AMS method) based on ASTM D6866-20, so it dries well after washing and shortens the drying time. can do.

Polyurethane foams are classified into rigid, semi-rigid and soft types, and are selected according to the application. For example, flexible polyurethane foams are often used for bedding such as mattresses and clothing such as pads for brassieres. The polyurethane foam of the present invention includes rigid, semi-rigid and flexible.

The polyurethane foam of the present invention is obtained from a polyurethane foam composition containing a polyol component, a polyisocyanate and a blowing agent. In the polyurethane foam composition, the polyol component and the polyisocyanate react with each other by stirring and mixing to form a polyurethane foam.

The polyol component includes polyol, which is a compound having two or more hydroxyl groups in one molecule. The polyol component includes plant-derived polyols. A plant-derived polyol is a polyol produced using a plant-derived raw material such as a vegetable oil.

Examples of vegetable oils include castor oil, sunflower oil, rapeseed oil, linseed oil, cottonseed oil, paulownia oil, coconut oil, poppy oil, corn oil, soybean oil and the like. Among them, a castor oil polyol produced using castor oil as a raw material is a suitable example as a plant-derived polyol.

The castor oil polyol may be a modified castor oil polyol, an unmodified castor oil polyol, or may contain both.
Modified castor oil polyols include transesterification products of castor oil and fats other than castor oil, transesterification products of castor oil and fat fatty acids, transesterification products of castor oil and polyhydric alcohols, castor oil fatty acids and Esterification reaction product with polyhydric alcohol, esterification reaction product of part of the hydroxyl group contained in castor oil and monocarboxylic acid such as acetic acid, reaction product obtained by addition polymerization of alkylene oxide to these, addition of hydrogen to these A hydrogen additive etc. are mentioned.
Unmodified castor oil polyols include refined castor oil polyols, semi-refined castor oil polyols, unrefined castor oil polyols, and the like.

The plant-derived polyol preferably has a functional group number of 2 to 3.5, a hydroxyl value of 40 to 180 mgKOH/g, and a molecular weight of 724 to 2931, and one type or a plurality of types may be used.
The amount of the plant-derived polyol is determined so that the biomass degree measured by ASTM D6866-20 is 24% or more, preferably 15 parts by mass or more, more preferably 30 parts by mass in 100 parts by mass of the polyol component. 80 parts by mass or more, more preferably 80 parts by mass or more. The polyol component may contain a petroleum-derived polyol. Moldability and productivity are improved by including petroleum-derived polyol.

The petroleum-derived polyol may be any of polyether polyol, polyester polyol, polyether ester polyol, etc., and one or more of them may be used.

Examples of polyether polyols include polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, neopentyl glycol, glycerin, pentaerythritol, trimethylolpropane, sorbitol and sucrose, ethylene oxide and propylene. Polyether polyols to which alkylene oxides such as oxides are added can be mentioned.

Examples of polyester polyols include polycondensation from aliphatic carboxylic acids such as malonic acid, succinic acid and adipic acid, aromatic carboxylic acids such as phthalic acid, and aliphatic glycols such as ethylene glycol, diethylene glycol and propylene glycol. Polyester polyols obtained by
Examples of polyether ester polyols include those obtained by reacting polyether polyols with polybasic acids to form polyesters, and those having both polyether and polyester segments in one molecule.

The petroleum-derived polyol preferably has a functional group number of 2.0 to 3.5, a hydroxyl value of 15 to 1,000 mgKOH/g, and a molecular weight of 100 to 10,000.

The polyisocyanate is not particularly limited, and may be aromatic, alicyclic, or aliphatic. Also, a bifunctional isocyanate having two isocyanate groups per molecule, or Tri- or more functional isocyanates having 3 or more isocyanate groups may be used, and these may be used alone or in combination.

Examples of bifunctional polyisocyanates include 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate (2,6-TDI), m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate (4,4'-MDI), 2,4'-diphenylmethanedianate (2,4'-MDI), 2,2'-diphenylmethane diisocyanate (2,2'-MDI), xyl aromatic compounds such as diisocyanate, 3,3′-dimethyl-4,4′-biphenylene diisocyanate, 3,3′-dimethoxy-4,4′-biphenylene diisocyanate, cyclohexane-1,4-diisocyanate, Alicyclic compounds such as isophorone diisocyanate, dicyclohexylmethane-4,4′-diisocyanate and methylcyclohexane diisocyanate; aromatic compounds such as butane-1,4-diisocyanate, hexamethylene diisocyanate, isopropylene diisocyanate, methylene diisocyanate and lysine diisocyanate can be mentioned. Diphenylmethane diisocyanate (MDI) may be used in combination with a plurality of types of polymeric MDI and prepolymers of polymeric MDI.

Examples of tri- or higher functional polyisocyanates include 1-methylbenzol-2,4,6-triisocyanate, 1,3,5-trimethylbenzol-2,4,6-triisocyanate, biphenyl-2,4,4′- triisocyanate, diphenylmethane-2,4,4'-triisocyanate, methyldiphenylmethane-4,6,4'-triisocyanate, 4,4'-dimethyldiphenylmethane-2,2',5,5'tetraisocyanate, triphenyl Methane-4,4',4''-triisocyanate and the like can be mentioned.

The isocyanate index (INDEX) is preferably 70-150, more preferably 80-130, most preferably 90-120. When the isocyanate index is less than 70, the foam moldability is degraded. On the other hand, if the isocyanate index exceeds 150, the foam becomes too hard and brittle, resulting in poor durability. The isocyanate index is a value obtained by dividing the number of moles of isocyanate groups in polyisocyanate by the total number of moles of active hydrogen groups such as hydroxyl groups in the polyol component and water as a blowing agent, and multiplying this value by 100. [NCO of polyisocyanate equivalent/active hydrogen equivalent×100].

Examples of foaming agents include water, hydrocarbons, halogen compounds, and the like, and one or more of these may be used. Examples of hydrocarbons include cyclopentane, isopentane, normal pentane, and the like. Halogen compounds include methylene chloride, trichlorofluoromethane, dichlorodifluoromethane, nonafluorobutylmethylether, nonafluorobutylethylether, pentafluoroethylmethylether, heptafluoroisopropylmethylether and the like. Among these, water is particularly suitable as the foaming agent. Water may be ion-exchanged water, tap water, distilled water, or the like. The blending amount of water as a foaming agent is 0.5 to 10 parts by mass, preferably 1 to 8 parts by mass, more preferably 1.5 to 5 parts by mass when the polyol component is 100 parts by mass. .

The polyol composition is appropriately blended with catalysts and auxiliaries as other components.
Any known catalyst for polyurethane foam can be used as the catalyst, and is not particularly limited. Usable catalysts include, for example, amine catalysts such as triethylamine, triethylenediamine and tetramethylguanidine; tin catalysts such as dibutyltin dilaurate and stannus octoate; and metal catalysts such as phenylmercuric propionate and lead octoate ( It is also called an organometallic catalyst.). The total amount of catalyst compounded is appropriately determined depending on the type of catalyst, but is generally 0.01 to 3.0 parts by mass, preferably 0.02 to 1.5 parts by mass, based on 100 parts by mass of the polyol component. parts, more preferably 0.05 to 1.2 parts by mass.

Examples of auxiliary agents include foam stabilizers, cross-linking agents, colorants, flame retardants, antibacterial agents, stabilizers, plasticizers, and the like.

As the foam stabilizer, those known for use in polyurethane foam can be used, including silicone foam stabilizers, fluorine-containing compound foam stabilizers, and surfactants. In particular, silicone-based foam stabilizers are suitable. Silicone-based foam stabilizers include those mainly composed of a siloxane chain, those having a linear structure of a siloxane chain and a polyether chain, those having a branched and branched structure, and those in which a polyether chain is modified into a siloxane chain in a pendant form. etc.

Examples of cross-linking agents include polyhydric alcohols such as ethylene glycol, diethylene glycol, glycerin, butanetetraol, and polyoxypropylene glycol, diethanolamine, polyamines, and the like, and these can be used alone or in combination of two or more.

Polyurethane foams include slab foam products and molded foam products, and the polyurethane foam of the present invention may be either one.
The foamed slab product is produced by mixing and stirring a polyurethane foam composition, discharging it onto a conveyor, foaming it on the conveyor to form a continuous polyurethane foam, and then cutting it into a predetermined size. On the other hand, a molded foamed product is obtained by injecting a polyurethane foam composition into a mold and foaming it, and has an outer shape corresponding to the inner surface shape of the mold.

In addition, the polyurethane foam of the present invention may be either one having cell membranes that have not been subjected to film-removing treatment, or one from which cell membranes have been removed by film-removing treatment.
The film-removing treatment is a known treatment for removing the cell membranes of the polyurethane foam, and includes a method of immersing the polyurethane foam in an alkaline solution to melt the cell membranes, and a method of housing the polyurethane foam in a closed container and removing oxygen or the like. There is a method of filling a closed container with a combustible gas and then igniting it to cause an explosion and destroy the cell membrane.

Examples of the present invention will be specifically described together with comparative examples. Polyurethane foam compositions of each example and each comparative example were prepared by stirring and mixing the following raw materials in the formulations shown in the table of FIG. Incidentally, Comparative Example 1 and Examples 1 to 3 are slab foamed products, and Comparative Example 2 and Example 4 are molded foamed products. In addition, in Example 2, the polyurethane foam of Example 1 was subjected to film removal treatment by explosion to remove the cell membrane, and was the same as Example 1 except for the presence or absence of the cell membrane.

<Polyol component>
・ Plant-derived polyol 1: unmodified (refined) castor oil polyol, 100% vegetable content, functional group number 2.7, hydroxyl value 160 mgKOH / g, molecular weight 947, product name: H-30, manufactured by Ito Oil Co., Ltd. ・ Plant-derived Polyol 2: 100 parts by mass of refined castor oil and 10.9 parts by mass of sebacic acid are allowed to react with stirring, and 100% vegetable castor oil polyol consisting of refined castor oil/sebacic acid = 2/1 mol. , functional group number 3.5, hydroxyl value 86 mgKOH/g, molecular weight 2182
・Petroleum-derived polyol 1; functional group number 3, hydroxyl value 24.1 mgKOH/g, molecular weight 6983.4, product name: KC737, manufactured by Sanyo Chemical Industries, Ltd. ・Petroleum-derived polyol 2; functional group number 3, hydroxyl value 56.1 mgKOH/ g, molecular weight 3000, product name: EP505S, manufactured by Mitsui Chemicals, Inc. Petroleum-derived polyol 3; polyether polyol, functional group number 3, hydroxyl value 56.1 mgKOH / g, molecular weight 3000, product name: GP-3050NS, Sanyo Chemical Industries Co., Ltd. Manufactured by the company ・Petroleum-derived polyol 4; functional group number 3, hydroxyl value 31 mgKOH/g, molecular weight 5429, product name: Y-7530, manufactured by Mitsui Chemicals SKC Polyurethane Co., Ltd.

<Crosslinking agent>
・Diethylene glycol <foaming agent>
・Water <Amine catalyst>
・ Amine catalyst 1; Aliphatic tertiary amine composition, product name: DABCO 33LSI, manufactured by Evonik Japan ・ Amine catalyst 2; Product name: 2Mabs, manufactured by Nippon Nyukazai Co., Ltd. <Foam stabilizer>
・Foam stabilizer 1; silicone type, product name: SZ1136, manufactured by Dow Corning Toray Co., Ltd. ・Foam stabilizer 2; silicone type, product name: L-594Plus, manufactured by Evonik Japan Co., Ltd. ・Foam stabilizer 3; Product name: L3184J, manufactured by Momentive Performance Materials Japan LLC <Metal catalyst>
・Stannath octoate, product name: MRH-110, manufactured by Johoku Chemical Industry Co., Ltd.

<Polyisocyanate>
・Polyisocyanate 1; 2,4-TDI/2,6-TDI=80/20 toluenediisocyanate, product name: Coronate T-80, manufactured by Toso Co., Ltd. ・Polyisocyanate 2; 2,4-TDI/2, 6-TDI = 65/35 toluene diisocyanate, product name: Coronate T-65, manufactured by Toso Co., Ltd. Polyisocyanate 3; Monomeric MDI (mixture of 4,4'-MDI and 2,4-MDI. 2, 4-MDI ratio is 25-50%)

The biomass degree, physical properties, and dryability after washing were measured for the polyurethane foams of each example and each comparative example. The measurement results are shown in FIG.
The biomass content (vegetation content) indicates both a value measured by accelerator mass spectrometry (AMS method) and a calculated value based on ASTM D6866-20.
ASTM D6866 stipulates that the concentration of carbon 14 in a reference substance and a sample of carbon 14 concentration in the atmosphere in 1950 are measured, and the ratio thereof is defined as the degree of biomass. However, since the present atmospheric carbon-14 concentration is increasing year by year, it is stipulated that this value is multiplied by a coefficient for correction. In the calculation according to ASTM D6866-20, the degree of biomass was calculated using REF (pMC) = 100.0, which is the atmospheric correction factor for 2020.
The biomass degree was evaluated by the measured value by the AMS method. The evaluation criteria were "⊚" when the measured value by the AMS method was 50% or more, "◯" when it was 24 to less than 50%, and "X" when it was less than 24%.
The calculated value is the formula: degree of biomass = number of parts of plant polyol added / (total number of parts added - gas loss)
It was calculated by gas loss=number of parts added with water/18×44.
"18" in the above gas loss calculation formula is the molecular weight of water, and "44" is the molecular weight of carbon dioxide.

Regarding physical properties, density (JIS K7222), 25% hardness (JIS K6400-2 6.7D method), number of cells (JIS K6400-1), air permeability (JIS K6400-7 A method), tensile strength (JIS K6400 -5 5), elongation (JIS K6400-5 5), tear strength (JIS K6400-5 6B), dry heat strain (JIS K6400-4 4.5.2A method), and rebound (JIS K6400-3). .

The dryness after washing was measured by the following methods for water absorption after washing, water absorption after dehydration, and water absorption after drying for 24 hours. Post-drying property evaluation and post-washing drying property comprehensive evaluation were performed. Compared to the slab foamed product, the molded foamed product has a skin layer that makes it difficult for water to escape. It was divided into slab foamed products and mold foamed products.

For the water absorption after washing, the first washing course, the second washing course, and the third washing course shown in FIG. The water absorption rate was calculated by measuring the weight of the sample each time it was washed, and the value of the water absorption rate after the completion of the third washing course was taken as the post-washing water absorption rate. The water absorption rate after each washing course is calculated according to the following formula.
Water absorption rate (%) = (weight of sample after each washing course - weight of sample before washing) / (weight of sample before washing) x 100
FIG. 3 shows the water absorption values for each time. "Before washing" means before the start of the first washing course.
The water absorbency after washing was evaluated according to the following criteria. For Comparative Example 1 and Examples 1 to 3 of the slab foamed product, "◎" when the water absorption after washing is less than 160%, "◯" when it is 160 to less than 200%, and "X" when it is 200% or more " For the molded foam products of Comparative Example 2 and Example 4, the post-washing water absorption rate was rated as "⊚" when it was less than 95%, "∘" when it was between 95% and less than 100%, and "×" when it was 100% or more.

After completion of the third washing course, the water absorption after dehydration was calculated by performing the first dehydration course and the second dehydration course shown in FIG. , the water absorption after the second dehydration course was taken as the post-dehydration water absorption. The water absorption after each dehydration course is calculated according to the following formula.
Water absorption rate (%) = (weight of sample after each dehydration course - weight of sample before washing) / (weight of sample before washing) x 100
FIG. 3 shows the water absorption values after each dehydration course.
Dehydration property after washing was evaluated according to the following criteria. For Comparative Example 1 and Examples 1 to 3 of the slab foamed product, "◎" when the water absorption after dehydration is less than 120%, "◯" when it is 120 to less than 185%, and "X" when it is 185% or more " For the molded foam products of Comparative Example 2 and Example 4, the water absorption after dehydration was rated as "⊚" when it was less than 90%, "∘" when it was 90 to less than 95%, and "X" when it was 95% or more.

The water absorption after drying for 24 hours was calculated by allowing the sample after the second dehydration course to stand at room temperature for 24 hours (20 to 28° C. is referred to as room temperature) and then calculating the water absorption from the weight of the sample. The water absorption after drying for 24 hours is calculated by the following formula.
Water absorption after drying for 24 hours (%) = (weight of sample after standing for 24 hours) / (weight of sample before washing) x 100
The water absorption values after drying for 24 hours are shown in FIG.
The dryness evaluation after washing was evaluated according to the following criteria. For Comparative Example 1 and Examples 1 to 3 of foamed slabs, the water absorption rate after drying for 24 hours is less than 1%, "◎", 1 to less than 3%, "○", and 3% or more. It was set as "x". For the molded foam products of Comparative Example 2 and Example 4, when the water absorption rate after drying for 24 hours is less than 5%, it is marked with "◎", when it is 5 to less than 10%, it is marked with "◯", and when it is 10% or more, it is marked with "×". bottom.

Comprehensive evaluation of washing dryness is "◎" when water absorbency evaluation after washing, evaluation of dehydration property after washing and evaluation of drying property after washing consist only of "◎" or "◎" and "〇". ”, If all of the post-washing water absorption evaluation, post-washing dehydration evaluation and post-washing dryness evaluation are “◯”, the washing drying comprehensive evaluation is “◯”, post-washing water absorption evaluation, post-washing dehydration evaluation And when even one of the evaluations of dryness after washing was "x", the comprehensive evaluation of washing dryness was set to "x".

<Results of Comparative Example 1 and Examples 1 to 3 of foamed slabs>
・Comparative example 1
Comparative Example 1 is an example in which the polyol component is 100 parts by mass of the petroleum-derived polyol 3 and the vegetable oil-derived polyol is 0 parts by mass.
Comparative Example 1 has a biomass degree of 1% by the AMS method, a biomass degree evaluation of “×”, a calculated biomass degree of 0%, a post-washing water absorption rate of 248.4%, a post-washing water absorption evaluation of “×”, and after dehydration. The water absorption rate was 193.3%, the dehydration property evaluation after washing was "x", the water absorption rate after drying for 24 hours was 3.95%, the drying property evaluation after washing was "x", and the overall drying property evaluation after washing was "x".

・Example 1
Example 1 is an example in which the polyol component is composed of 60 parts by mass of plant-derived polyol 1, 20 parts by mass of vegetable oil-derived polyol 2, and 20.45 parts by mass of petroleum-derived polyol 3.
Example 1 has a biomass degree of 58% by the AMS method, a biomass degree evaluation of “◎”, a calculated biomass degree of 53%, a post-washing water absorption rate of 169.9%, a post-washing water absorption evaluation of “◯”, and after dehydration. Water absorption rate 137.0%, dehydration evaluation after washing "O", water absorption rate after drying for 24 hours 0.06%, drying evaluation after washing "◎", water absorption after washing, water absorption after dehydration and 24 hours All of the post-drying water absorption rates were smaller than those of Comparative Example 1, and the comprehensive evaluation of the post-washing drying property was "⊚".

・Example 2
Example 2 is an example in which a polyurethane foam formed from the same polyol composition as in Example 1 was subjected to film removal treatment to remove cell membranes.
Example 2 has the same physical properties and biomass degree as Example 1, which has the same polyol composition formulation, and has a biomass degree of 57% by the AMS method, a biomass degree evaluation of “◎”, and a calculated biomass degree of 53. %Met.
In Example 2, the water absorption rate after washing was 136.0%, the water absorption evaluation after washing was "⊚", the water absorption rate after dehydration was 107.2%, the dehydration evaluation after washing was "⊚", and the water absorption after drying for 24 hours was 0.06. %, the dryness evaluation after washing is "◎", and the water absorption after washing, the water absorption after dehydration, and the water absorption after drying for 24 hours are all smaller than those in Comparative Example 1, and the overall dryness evaluation after washing is "◎". Met. Since the cell membrane of the polyurethane foam was removed, the water absorption after washing and the water absorption after dehydration were smaller than those of Example 1, and the drying property was improved.

・Example 3
Example 3 is an example in which the polyol component is composed of 37 parts by mass of plant-derived polyol 1 and 63 parts by mass of petroleum-derived polyol 4.
Example 3 has a biomass degree of 28% by the AMS method, a biomass degree evaluation of “◯”, a calculated biomass degree of 26%, a post-washing water absorption rate of 197.1%, a post-washing water absorption evaluation of “◯”, and after dehydration. Water absorption rate 184.7%, dehydration evaluation after washing "○", water absorption rate after drying for 24 hours 1.77%, drying evaluation after washing "○", water absorption after washing, water absorption after dehydration and 24 hours All of the post-drying water absorption rates were smaller than those of Comparative Example 1, and the comprehensive evaluation of the post-washing drying property was "Good".

<Results of Comparative Example 2 and Example 4 of Molded Foam>
・Comparative example 2
Comparative Example 2 is an example in which the polyol component is composed of 70 parts by mass of petroleum-derived polyol 1, 10 parts by mass of petroleum-derived polyol 2, and 20 parts by mass of petroleum-derived polyol 3, and 0 parts by mass of vegetable oil-derived polyol.
Comparative Example 2 has a calculated biomass degree of 0%, a post-washing water absorption rate of 115.6%, a post-washing water absorption evaluation of “×”, a post-dehydration water absorption rate of 96.4%, and a post-washing dehydration evaluation of “◎”. After drying for 24 hours, the water absorption rate was 13.7%, the dryness evaluation after washing was "x", and the overall dryness evaluation after washing was "x".

・Example 4
Example 4 is an example in which the polyol component is composed of 22 parts by mass of plant-derived polyol 1, 17 parts by mass of vegetable oil-derived polyol 2, 51 parts by mass of petroleum-derived polyol 1, and 10 parts by mass of petroleum-derived polyol 2. .
Example 4 has a biomass degree of 27% by the AMS method, a biomass degree evaluation of “◯”, a calculated biomass degree of 23%, a post-washing water absorption rate of 94.0%, a post-washing water absorption evaluation of “◎”, and after dehydration. The water absorption rate after washing was 87.5%, the dehydration property evaluation after washing was "◎", the water absorption rate after drying for 24 hours was 4.1%, and the drying property evaluation after washing was "◎". All of the post-drying water absorption rates were smaller than those of Comparative Example 2, and the comprehensive evaluation of post-washing dryness was "⊚".

Thus, the polyurethane foam of the present invention has good drying properties after washing.
It should be noted that the present invention is not limited to the embodiments, and can be modified without departing from the gist of the invention.

The polyurethane foam of the present invention dries well after washing, and can be used for articles to be washed, such as bedding such as mattresses and pillows, furniture such as cushions for floor cushions, clothing such as brassiere pads, and the like. can.

Claims (2)

A polyurethane foam having a biomass degree of 24% or more as measured by ASTM D6866-20. In a polyurethane foam obtained from a polyurethane foam composition containing a polyol component, a polyisocyanate, and a blowing agent,
The polyol component contains a plant-derived polyol,
A polyurethane foam characterized by having a biomass degree of 24% or more as measured by ASTM D6866-20.

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